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(No Model.)

L. P. OLAWSON & J. A; KELLEIM PAPER SLITTING MACHINE.

No. 479,349. Patented July 19,1892.

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UNITED STATES PATENT OFFICE.

LINUS P. OLAWSON AND JOHN A. KELLER, OF HAMILTON, OHIO, ASSIGNORS TO THE BLACK & OLAWSON COMPANY, OF SAME PLACE.

PAPER-SLITTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 479,349, dated July 19, 1892.

Application filed April 13, 1892- fierial N0. 42 8,948- (No model.)

To aIZZ whom it may concern.-

Be it known that we, LINUs P. CLAWSON and JOHN A. KELLER, of Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Paper-slitting Machines, of which the following is a specification.

This invention pertains to improvements in that class of machines employed in slitting wide webs of paper into several narrower webs; and it relates to improvements in that particular type of slitting-machines known as duplex slitters,in which there are two sets of slitters so arranged that while one set is in [5 operative position and operating the other set is in convenient position to have its slitters adjusted for new widths of slitting, thus permitting rapid changes to be made in the slitting widths.

Our improvements will be readily understood fro m the following description, taken in connection with the accompanying drawings, in which Figure 1 is a side elevation of a duplex slitting-machine exemplifying our present invention; Fig. 2, a sectional plan of the same, the section beingin the plane of line a, viewed in the direction of arrow b; and Fig. 3, a vertical section of a portion of the same in the plane of line 0, viewed in the direction of arrow a.

In the drawings, 1 indicates the fixed frame of the machine, consisting of two uprights at a distance apart corresponding with the 3 5 length of the machine or the maximum width of paper to be dealt with; 2, carriageguides formed on the edges of these uprights, the frame thus presenting a pair of carriageguides at the front and a similar pair at the rear; 3, a pair of slitter-carriages, one arranged upon the carriage-guide at the front of the frame and the other arranged upon the guides at the rear, the carriages being capable of sliding up and down on the guides, so

that the slitters carried by the carriages may occupy a high-up operativeposition or a low idle position; 4, a set of slitters mounted 1n each carriage, these slitters being of the usual construction and consisting, essentially, of a pair of horizontal shafts, each carrying slitting-disks adjustable along the shafts; 5, toothed racks formed upon the slitter-carriages at each side of the machine, the racks facing each other and having such length with reference to the position of the slittershafts that when one set of slitters is in the extreme upper position on the frame and the other set of slitters in the extreme lower position the contiguous ends of the racks will overlap each other vertically; 6, a shaft jour- 6o naled in the uprights of the frame and extending across the frame and disposed centrally between the racks of the two carriages and vertically midway between the two sets of slitters; 7, a pair of pinions fast on this shaft, one at each end of the shaft, in position to engage the pair of racks at that side of the machine, and 8 a hand-wheel on this shaft.

When the parts are in the position shown in Fig. 1, the upper pair of slitters is in posi tion for operating upon the web of paper in the usual manner, and while this set of slitters is so operating the slitter-disks of the lower set may be adjusted, as desired, for new width ofslitting, and when it is desired to bring the second set of slitters into action it is only necessary toturn the hand-wheel in the proper direction, whereupon the slitters at the right will rise to the operating level and the slitters at the left will be drawn down to the idle position. This change may be quickly made, thus interrupting the run of the paper fora brief time only, and after the change has been made any desired adj ustments may be made upon the slitters which have been moved down to the idle position.

WVe claim as our invention In a slitting-machine, the combination, substantially as set forth, of a pair of uprights provided with front and rear carriage-guides, 9o slitter-carriages arranged for up-and-down motion on said guides and provided with inwardly-facing racks at each upright, a set of slitters mounted in each carriage, a shaft disposed across the machine between the planes 5 of movement of the two carriages, and pinions on said shaft at each side of the frame in position to engage each with a pair of said racks.

LINUS P. OLAWSON. JOHN A. KELLER.

Witnesses:

J AS. FITTON, J. W. SEE. 

